All rumors. But frankly, when has Nintendo not made an original controller? From the NES (creation of D-Pad) to the SNES new shape, 4 extra buttons) to the N64 (standardization of joystick and trigger button) to the GameCube (large and small buttons, force senstive buttons. I think the Wii speaks for itself.
I just hope it can also be used as a regular controller with full button support. Nintendo has already said it will incorperate the same motion technology of the Wii so it can play Wii games. I just hope it also has 4 buttons, 2 shoulder buttons and a D-pad.